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            <h1 style="display: none">全局组件、局部组件、递归组件</h1>
            
            
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                <h1 id="配置全局组件"><a href="#配置全局组件" class="headerlink" title="配置全局组件"></a>配置全局组件</h1><blockquote>
<p>这里封装一个全局组件<code>Global.vue</code></p>
</blockquote>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;div id=&quot;global-component&quot; align=&quot;center&quot;&gt;<br>    全局组件<br>  &lt;/div&gt;<br>&lt;/template&gt;<br><br>&lt;style scoped&gt;<br>#global-component&#123;<br>  border: 1px solid black;<br>  margin: 10px 10px;<br>  line-height: 25px;<br>  width: 80px;<br>  height: 25px;<br>&#125;<br>&lt;/style&gt;<br></code></pre></td></tr></table></figure>

<blockquote>
<p>在main.ts引入注册，类似element注册</p>
</blockquote>
<figure class="highlight typescript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><code class="hljs typescript"><span class="hljs-comment">// main.ts</span><br><br><span class="hljs-comment">// 如果您正在使用CDN引入，请删除下面一行。</span><br><span class="hljs-keyword">import</span> * <span class="hljs-keyword">as</span> <span class="hljs-title class_">ElementPlusIconsVue</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;@element-plus/icons-vue&#x27;</span><br><br><span class="hljs-keyword">const</span> app = <span class="hljs-title function_">createApp</span>(<span class="hljs-title class_">App</span>)<br><span class="hljs-keyword">for</span> (<span class="hljs-keyword">const</span> [key, component] <span class="hljs-keyword">of</span> <span class="hljs-title class_">Object</span>.<span class="hljs-title function_">entries</span>(<span class="hljs-title class_">ElementPlusIconsVue</span>)) &#123;<br>  app.<span class="hljs-title function_">component</span>(key, component)<br>&#125;<br></code></pre></td></tr></table></figure>

<figure class="highlight typescript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><code class="hljs typescript"><span class="hljs-keyword">import</span> &#123;createApp&#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;vue&#x27;</span><br><span class="hljs-keyword">import</span> <span class="hljs-title class_">App</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;./App.vue&#x27;</span><br><span class="hljs-keyword">import</span> <span class="hljs-title class_">Global</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;@/view/Global.vue&quot;</span>;<br><br><span class="hljs-keyword">const</span> app = <span class="hljs-title function_">createApp</span>(<span class="hljs-title class_">App</span>)<br>app.<span class="hljs-title function_">component</span>(<span class="hljs-string">&#x27;Global&#x27;</span>,<span class="hljs-title class_">Global</span>)<br>app.<span class="hljs-title function_">mount</span>(<span class="hljs-string">&#x27;#app&#x27;</span>)<br></code></pre></td></tr></table></figure>

<p>在其他vue页面 立即使用即可 无需引入</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;Global/&gt;<br>&lt;/template&gt;<br><br>&lt;script setup lang=&quot;ts&quot;&gt;<br>&lt;/script&gt;<br></code></pre></td></tr></table></figure>

<h1 id="批量注册全局组件"><a href="#批量注册全局组件" class="headerlink" title="批量注册全局组件"></a>批量注册全局组件</h1><p>可以参考element ui 其实就是遍历一下然后通过 app.component 注册</p>
<p><img src="https://img-blog.csdnimg.cn/5b4de39d5f8b48c38f751d510b4f1f61.png" srcset="/img/loading.gif" lazyload alt="img"></p>
<h1 id="配置局部组件"><a href="#配置局部组件" class="headerlink" title="配置局部组件"></a>配置局部组件</h1><figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;div class=&quot;wraps&quot;&gt;<br>    &lt;layout-menu :flag=&quot;flag&quot; @on-click=&quot;getMenu&quot; @on-toogle=&quot;getMenuItem&quot; :data=&quot;menuList&quot; class=&quot;wraps-left&quot;&gt;&lt;/layout-menu&gt;<br>    &lt;div class=&quot;wraps-right&quot;&gt;<br>      &lt;layout-header&gt; &lt;/layout-header&gt;<br>      &lt;layout-main class=&quot;wraps-right-main&quot;&gt;&lt;/layout-main&gt;<br>    &lt;/div&gt;<br>  &lt;/div&gt;<br>&lt;/template&gt;<br><br>&lt;script setup lang=&quot;ts&quot;&gt;<br>import &#123; reactive,ref &#125; from &quot;vue&quot;;<br>import layoutHeader from &quot;./Header.vue&quot;;<br>import layoutMenu from &quot;./Menu.vue&quot;;<br>import layoutMain from &quot;./Content.vue&quot;;<br></code></pre></td></tr></table></figure>

<p>就是在一个组件内（A） 通过import 去引入别的组件(B) 称之为局部组件</p>
<p>应为B组件只能在A组件内使用 所以是局部组件</p>
<p>如果C组件想用B组件 就需要C组件也手动import 引入 B 组件</p>
<h1 id="配置递归组件"><a href="#配置递归组件" class="headerlink" title="配置递归组件"></a>配置递归组件</h1><p>原理跟我们写js递归是一样的 自己调用自己 通过一个条件来结束递归 否则导致内存泄漏</p>
<p>案例递归树</p>
<p>在父组件配置数据结构 数组对象格式 传给子组件</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;TreeCom :data=&quot;data&quot;/&gt;<br>&lt;/template&gt;<br><br>&lt;script setup lang=&quot;ts&quot;&gt;<br>import &#123;reactive&#125; from &quot;vue&quot;;<br>import TreeCom from &quot;@/view/TreeCom.vue&quot;;<br><br>type TreeProps = &#123;<br>  name: string,<br>  icon?: string,<br>  children?: TreeProps[] | []<br>&#125;<br><br>const data = reactive&lt;TreeProps[]&gt;([<br>  &#123;<br>    name: &quot;no.1&quot;,<br>    children: [<br>      &#123;<br>        name: &quot;no.1-1&quot;,<br>        children: [<br>          &#123;<br>            name: &quot;no.1-1-1&quot;,<br>          &#125;,<br>        ],<br>      &#125;,<br>    ],<br>  &#125;,<br>  &#123;<br>    name: &quot;no.2&quot;,<br>    children: [<br>      &#123;<br>        name: &quot;no.2-1&quot;,<br>      &#125;,<br>    ],<br>  &#125;,<br>  &#123;<br>    name: &quot;no.3&quot;,<br>  &#125;,<br>])<br>&lt;/script&gt;<br></code></pre></td></tr></table></figure>

<p>子组件接收值 第一个script</p>
<figure class="highlight typescript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><code class="hljs typescript"><span class="hljs-keyword">type</span> <span class="hljs-title class_">TreeProps</span> = &#123;<br>  <span class="hljs-attr">name</span>: <span class="hljs-built_in">string</span>,<br>  icon?: <span class="hljs-built_in">string</span>,<br>  children?: <span class="hljs-title class_">TreeProps</span>[] | []<br>&#125;<br><br><span class="hljs-keyword">let</span> props=defineProps&lt;&#123;<br>  <span class="hljs-attr">data</span>:<span class="hljs-title class_">TreeProps</span>[]<br>&#125;&gt;();<br></code></pre></td></tr></table></figure>

<hr>
<h1 id="子组件增加一个script-定义组件名称为了-递归用"><a href="#子组件增加一个script-定义组件名称为了-递归用" class="headerlink" title="子组件增加一个script 定义组件名称为了 递归用"></a>子组件增加一个script 定义组件名称为了 递归用</h1><h2 id="给我们的组件定义名称有好几种方式"><a href="#给我们的组件定义名称有好几种方式" class="headerlink" title="给我们的组件定义名称有好几种方式"></a>给我们的组件定义名称有好几种方式</h2><h3 id="1-在增加一个script-通过-export-添加name"><a href="#1-在增加一个script-通过-export-添加name" class="headerlink" title="1.在增加一个script 通过 export 添加name"></a>1.在增加一个script 通过 export 添加name</h3><figure class="highlight xquery"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><code class="hljs xquery"><span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">script</span> <span class="hljs-attr">lang</span>=<span class="hljs-string">&quot;ts&quot;</span>&gt;</span><span class="language-javascript"></span></span><br><span class="language-javascript"><span class="language-xml"><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> </span></span><span class="language-xquery">&#123;</span><br><span class="language-xquery"> <span class="hljs-built_in"> name</span>:<span class="hljs-string">&quot;TreeItem&quot;</span></span><br><span class="language-xquery">&#125;</span><span class="language-xml"></span><br><span class="language-xml"><span class="hljs-tag">&lt;/<span class="hljs-name">script</span>&gt;</span></span><br></code></pre></td></tr></table></figure>

<h3 id="2-直接使用文件名当组件名"><a href="#2-直接使用文件名当组件名" class="headerlink" title="2.直接使用文件名当组件名"></a>2.直接使用文件名当组件名</h3><p><img src="https://img-blog.csdnimg.cn/42572d5f39b94ccca67608ea8b0b8d6a.png" srcset="/img/loading.gif" lazyload alt="img"></p>
<p>3.使用插件 </p>
<p><a target="_blank" rel="noopener" href="https://github.com/sxzz/unplugin-vue-macros/blob/HEAD/packages/define-options/README-zh-CN.md">unplugin-vue-macros&#x2F;README-zh-CN.md at 722a80795a6c7558debf7c62fd5f57de70e0d0bf · sxzz&#x2F;unplugin-vue-macros · GitHub</a></p>
<p> unplugin-vue-define-options</p>
<figure class="highlight coffeescript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><code class="hljs coffeescript"><span class="hljs-keyword">import</span> DefineOptions <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;unplugin-vue-define-options/vite&#x27;</span><br><span class="hljs-keyword">import</span> Vue <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;@vitejs/plugin-vue&#x27;</span><br><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> defineConfig(&#123;<br>  plugins: [Vue(), DefineOptions()],<br>&#125;)<br></code></pre></td></tr></table></figure>

<p> ts支持</p>
<figure class="highlight prolog"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><code class="hljs prolog"><span class="hljs-string">&quot;types&quot;</span>: [<span class="hljs-string">&quot;unplugin-vue-define-options/macros-global&quot;</span>],<br></code></pre></td></tr></table></figure>

<p><img src="https://img-blog.csdnimg.cn/703a8f3167e8448eb0fc1616884dee1a.png" srcset="/img/loading.gif" lazyload alt="img"></p>
<p>template </p>
<p>TreeItem 其实就是当前组件 通过import 把自身又引入了一遍 如果他没有children 了就结束</p>
<figure class="highlight handlebars"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><code class="hljs handlebars"><span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">style</span>=<span class="hljs-string">&quot;margin-left:10px;&quot;</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;tree&quot;</span>&gt;</span></span><br><span class="language-xml">  <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">:key</span>=<span class="hljs-string">&quot;index&quot;</span> <span class="hljs-attr">v-for</span>=<span class="hljs-string">&quot;(item,index) in data&quot;</span>&gt;</span></span><br><span class="language-xml">    <span class="hljs-tag">&lt;<span class="hljs-name">div</span> @<span class="hljs-attr">click</span>=<span class="hljs-string">&#x27;clickItem(item)&#x27;</span>&gt;</span></span><span class="hljs-template-variable">&#123;&#123;<span class="hljs-name">item.name</span>&#125;&#125;</span><span class="language-xml"></span><br><span class="language-xml">  <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">  <span class="hljs-tag">&lt;<span class="hljs-name">TreeItem</span> @<span class="hljs-attr">on-click</span>=<span class="hljs-string">&#x27;clickItem&#x27;</span> <span class="hljs-attr">v-if</span>=<span class="hljs-string">&#x27;item?.children?.length&#x27;</span> <span class="hljs-attr">:data</span>=<span class="hljs-string">&quot;item.children&quot;</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">TreeItem</span>&gt;</span></span><br><span class="language-xml"><span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml"><span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br></code></pre></td></tr></table></figure>

<p> <img src="https://img-blog.csdnimg.cn/e70cd74130e84cd2a6a4be220ca2a312.png" srcset="/img/loading.gif" lazyload alt="img"></p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;div v-for=&quot;(item,index) in data&quot;&gt;<br>    &lt;input type=&quot;checkbox&quot;&gt;&lt;span&gt;&#123;&#123;item.name&#125;&#125;&lt;/span&gt;<br>    &lt;TreeCom v-if=&quot;item?.children?.length&quot; :data=&quot;item.children&quot;/&gt;<br>  &lt;/div&gt;<br>&lt;/template&gt;<br><br>&lt;script setup lang=&quot;ts&quot;&gt;<br>type TreeProps = &#123;<br>  name: string,<br>  icon?: string,<br>  children?: TreeProps[] | []<br>&#125;<br><br>let props=defineProps&lt;&#123;<br>  data:TreeProps[]<br>&#125;&gt;();<br><br>&lt;/script&gt;<br>&lt;style scoped&gt;<br>div&#123;<br>  margin-left: 10px;<br>&#125;<br>&lt;/style&gt;<br></code></pre></td></tr></table></figure>


                
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